Konig 1A CS10UW001WH

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Official specifications:

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The box contained the charger and a extreme simple instruction sheet (Connect charger to wall socket, connect charger to device and then the usual warnings).

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Measurements


Konig%201A%20CS10UW001WH%20230V%20load%20sweep

Output voltage stays very stable and the current limit is fairly precise at 1.15A.

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At 120V the current limit is slightly lower.

Konig%201A%20CS10UW001WH%20230V%20load%20test

There is no problem maintaining the rated 1A current.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

Temp3387

M1: 65,8C, HS1: 77,0C
The hot spot (HS1) here is the rectifier diode.

Temp3388

M1: 43,1C, HS1: 47,8C

Temp3389

M1: 50,7C, HS1: 67,5C
Here HS1 is the transformer, probably transferred via the black wire on top of the transformer.

Temp3390

M1: 54,3C, HS1: 72,1C

Temp3391

HS1: 75,3C

10ohm

Noise at 0.5A load is: 18mV rms and 244mVpp.

5ohm

Noise at 1A load is: 19mV rms and 244mVpp.



Tear down

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My vice and a blow form my mallet was needed to open it.

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This piece of paper is used to increase the isolation.

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At the mains input is a fusible resistor (10R1W). There are two mains capacitors with an inductor (L1) between.

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On the side view the inductor is easy to see. The transformer uses flying leads for low volt to get better isolation distance.

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The bridge rectifier (BD1) and the mains switcher (U1) is on this side, notice the slot in the circuit board between some of the pins on the mains switcher.
D4 is the rectifier diode. There is a resistor made with circuit board track and space for a second output capacitor, but they where not needed.

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About 6mm isolation distance.


Testing with 2830 volt and 4242 volt between mains and low volt side, did not show any safety problems.



Conclusion

This is a small usb power supply with only 1A output, everything looks good



Notes

Charger was supplied by Pro backup (probackup.nl)
My high voltage test is done with a real HiPot tester allowing me to use the correct voltages for US and EU.

Index of all tested USB power supplies/chargers
Read more about how I test USB power supplies/charger